* {
  margin: 0px;
  padding: 0px;
}

div {
  width: 800px;
  height: 300px;
  background-color: pink;
  display: flex;
  justify-content: center;
  align-items: center;
}

div span {
  width: 150px;
  height: 100px;
  background-color: aqua;
}
